Tile or paving-block.



H. R. WARDELL.

TILE 0H PAVING BLOCK.

APPLICATION FILED DEc.23. I915. RENEWED AUG. 16.1918.

L28IAQQI Patent-ed Oct. 15, I918.

rnriaur ora ion HENRY R. WARDELL, OF NEW YORK, N. 5. ASSIGNOR 'IO H. W. JQHNS-MANVILLE COMPANY, A CORPORATION OF NEW YORK.

TILE OR PAVING-BLOCK.

Specification of Letters Patent.

Patented oc-t. 1L5, ieie.

' Application filed December 2a, 1915, Serial No. 68,449. Renewed August is, 1918. Serial No. 250,233.

To all whom it may concern:

Be it known that I, HENRY R. VVARDELL,

a citizen of. the United States of America,-

tiles or blocks used-for paving and similar purposes, it is particularly useful in cases where the paving of floors, or linings of walls must not only be of a material which is hard and durable, but mustalso be a fairly good non-conductor of heat and impervious to moisture.

My invention is particularly useful as a pavement for stalls or stables in which animals of highly bred and delicate stock are kept. The ordinary flooring of cement or brick, is absorbent of moisture and filth and a good conductor of heat. Hence it is unsanitary and forms cold, slimy, uncomfortable surfaces for cattle to rest upon. Glazed tile, is of course, non-absorbent of moisture, but is a verygood conductor of heat. As a result high priced dairy cows often contract diseases of the udder from lying on such floors, and even if the effect of the cold surfaces is not so serious as to produce disease, the resulting discomfort interferes with the full production of milk and cream by the animal. My invention overcomes this difficulty by producing a floor-surfacing or paving which is as non-conducting of heat as a spruce flooring of the same thickness, has

nearly as much elasticity as such sprucev flooring would possess, is as impervious to moisture as glazed tiles, and affords as sure a footing for the animals as would a wooden I compress1on,-wh1le Fig. 2 is a similar view To this end my invention consists in a tile or paving blo k composed of granulated.

cork, finely divided mineral matter, such as limestone dust'and sand, and a water resistant cementing material such as asphalt.

The best method of producing these blocks or tiles atpresent known to me is to firstthe completed tile.

termixed so that the fine particles of limestone dust will arrange themselves between the larger particles of sand, filling the voids that would otherwise exist between said sand particles, the sand and limestone mixture will be disseminated evenly between the much larger particles of granulated cork, filling the. voids which would otherwise exist between these, and the liquid asphalt will permeate the'mass forming films of a ce-' menting medium between all adjacent surfaces of the above recited constituent particles. poured into molds of a length and breadth equal to the length and breadth of the tiles or blocks to be produced, but of a depth equal to about double the thickness desired in Each molded mass is then subjected, preferably while still in the mold, to intense pressure in the direction of its thickness, with the result that the elastic cork particles are compressed into less space, and the mineral :particles are intimately compacted together until they fill solidly all spaces between the cork particles and the rethickness and double the density of the origi nal molded mass. The material is left in the mold under this pressure until itcools; It can then be taken out, and will retain its form, the compressed cork particles being restrained from expansion by the binding ac- .tion of the cold, hard asphalt which has become a firm matrix in which all the'partic-les of cork and mineral matter are embedded. I i y i In theaccompanying sheet of drawings, Figure 1 is a perspective view of the molded mass having a thickness usually of about four inches as it lies in the mold before most satisfactory pavement as it is slightly.

elastic, not slippery, absolutely waterproof, and a non-conductorof heat. It fails only in positions where it is subjected to heat.

Other materials of a mineral character can be substituted in some cases for the sand and limestone mentioned above, and the The hot and plastic mass is then 8O 1 sultant compacted mass has about half the proportions may be varied Within limits.

block need not be carried to the full extent hereinbefore set out, and less pressure can be used in the manufacturing process. v

Having described my invention,.I claim: 1. As an article of manufacture a tile or paving block composed of a dense compacted mass of granulated cork, finely divided min- ,eral matter, and asphalt, the mineral matter comprising approximately thirty per cent.-

and the asphalt, approximately ten per cent.- by weight of the'mass in which the .mineral particles fill substantially all of the voids which would otherwise be left between the cork particles and cementing asphalt. films intervene between all adjacent surfaces ofthe constituent particles.

2. As an article of manufacture a tile or paving block composed of a dense, com pacted mass of granulated 'cork, sand, lime- -.ticles.

' Witnesses:

stone dust and asphalt, in which the limestone dust fills the voids between the larger particles of sand, and the limestone dust and.

sand fill the voids between the larger particles-of granulated cork, while films of v asphalt existas a cementing medium between all adjacent surfaces of the above recited constituent particles.

3. As an article of manufacture a tile or pavingblock' consisting of' a dense, compacted mass composed of approximately sixty per cent. of granulated cork, twenty per cent.

'of sand, ten per cent. of limestone dust and ten per cent. of hard asphalt, in weight, in

which the limestone dust fills the voids belimestone dust and .sand fill the voids between the larger particles of granulated cork, while films of asphalt exist as a ce- 'menting medium between all adjacent surfaces of the above recited constituent par- HENRY RLWARDELL.

CHARLES E Hoirron, .A.J.ARIEL..

tween the larger-- particles of sand, and the 

